Circuit Description
The compressor receives a refrigerant compression demand signal from the air conditioning amplifier. Based on this signal, the compressor changes the amount of compressor output.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B1451 Compressor Solenoid Circuit
Conditions for Running the DTC
This DTC shall run when the ignition is On.
Conditions for Setting the DTC
Open or short in solenoid of the externally changeable compressor circuit.
Action Taken When the DTC Sets
The A/C compressor will be disabled.
Conditions for Clearing the DTC
The DTC will clear when conditions for setting the DTC have been repaired.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: HVAC Schematics Connector End View Reference: Component Connector End Views | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |
2 |
Is the resistance measured within the specified values? | Below 1 Ohm | Go to Step 3 | Go to Step 5 |
3 | Measure the resistance between connector B7 terminal 1 and terminal 2 at approximately 20°C (68°F). Is the resistance measured within the specified values? | 10-11 Ohms | Go to Step 4 | Go to Step 7 |
4 |
Is the resistance measured within the specified values? | E62 terminal 7 - B7 terminal 2 = Below 1 Ohm E62 terminal 7 - body ground = 10 Kohms or higher -- | Go to Step 8 | Go to Step 6 |
5 | Repair or replace harness or A/C compressor solenoid B7 connector. Did you complete the repair or replacement? | -- | Go to Step 9 | -- |
6 | Repair or replace harness of the A/C compressor solenoid B7 connector or the A/C amplifier E62 connector. Did you complete the repair or replacement? | -- | Go to Step 9 | -- |
7 | Replace the A/C compressor. Did you complete the replacement? | -- | Go to Step 9 | -- |
8 | Replace the A/C amplifier. Did you complete the replacement? | -- | Go to Step 9 | -- |
9 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
